Whenever a revelation came to the Prophet (peace and blessings of Allaah be upon him), a group of Companions would write down the revelations on various things , which were called Katibe revelation . According to the research , about 42 Companions wrote the revelation. Whenever Hazrat Jibril (peace be upon him) used to bring the Qur'an to the Prophet (peace be upon him), he would tell him which part of the sura should be attached. And the Prophet (peace and blessings of Allaah be upon him) used to call the Companions of the Revelation and instruct them to connect the revealed parts to the designated place of the relevant Surah. Hazrat Zayd bin Thabit (may Allah be pleased with him) is one of the Qatib Wahid. Besides Hazrat Abu Bakr , Hazrat Umar , Hazrat Uthman , Hazrat Ali Radiyallahu Anhu , Ubai Ibn Ka'b , Hazrat Zubair Ibn Awwam , Hazrat Mu'abiya , Hazrat Abbas Ibn Saeed , Hazrat Abdullah Ibn Rawaha , Hazrat The names of Khalid ibn al-Walid , Hazrat Mughira ibn Shu'bah and Hazrat Tahanzala Radiyallahu Anhu are particularly noteworthy.